/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.kubernetes.highavailability;

import org.apache.flink.api.common.JobID;
import org.apache.flink.kubernetes.utils.Constants;
import org.apache.flink.runtime.jobmanager.JobGraphStoreUtil;

import static org.apache.flink.kubernetes.utils.Constants.JOB_GRAPH_STORE_KEY_PREFIX;

/**
 * Singleton {@link JobGraphStoreUtil} implementation for Kubernetes.
 *
 */
public enum  KubernetesJobGraphStoreUtil implements JobGraphStoreUtil {
	INSTANCE;

	/**
	 * Convert a key in ConfigMap to {@link JobID}. The key is stored with prefix
	 * {@link Constants#JOB_GRAPH_STORE_KEY_PREFIX}.
	 *
	 * @param key job graph key in ConfigMap.
	 *
	 * @return the parsed {@link JobID}.
	 */
	public JobID nameToJobID(String key) {
		return JobID.fromHexString(key.substring(JOB_GRAPH_STORE_KEY_PREFIX.length()));
	}

	/**
	 * Convert a {@link JobID} to config map key. We will add prefix {@link Constants#JOB_GRAPH_STORE_KEY_PREFIX}.
	 *
	 * @param jobID job id
	 *
	 * @return a key to store job graph in the ConfigMap
	 */
	public String jobIDToName(JobID jobID) {
		return JOB_GRAPH_STORE_KEY_PREFIX + jobID;
	}
}
